libwebrtc.dylib contains a global initializer:
$ nm -j libwebrtc.dylib | fgrep __GLOBAL__
This appears to be the initializer for g_log_crit and LogMessage::streams_ in webrtc/base/logging.cc
These things should be initialized lazily so that not every executable that links against WebKit pays the launch-time cost of initializing them.
*** This bug has been marked as a duplicate of bug 169973 ***